<template>
  <div class="wrapper">
    <swiper :options="swiperOption"  v-if="showSwiper">
      <!-- slides -->
      <swiper-slide v-for="item of list" :key="item.id">
        <img class="swiper-img" :src="item.imgUrl">
      </swiper-slide>
      <!-- Optional controls -->
      <div class="swiper-pagination"  slot="pagination"></div>
    </swiper>
  </div>
</template>
<!-- data:function(){} -->
<script>
export default {
  name: 'HomeSwiper',
  props: {
    list: Array
  },
  data () {
    return {
      swiperOption: {
        pagination: '.swiper-pagination',
        loop: true
      }
    }
  },
  computed: {
    showSwiper () {
      return this.list.length
    }
  }
}
</script>
<!-- 三个箭头表示样式穿透，不受scoped影响 scoped是当前组件，swiper-pagination-bullet-active在另外组件生成-->

<style lang="stylus" scoped>
.wrapper >>> .swiper-pagination-bullet-active
  background:#fff
.wrapper
  width:100%
  height:0
  overflow: hidden
  padding-bottom: 31.5%
  .swiper-img
    width:100%
</style>
